Apparatus for use in annealing or otherwise treating metals



A. HOWGATE.

APPARATUS FOR USE IN ANNEALING OR OTHERWISE TREATING, METALS APPLICATION FILED JULY 8. 1919.

1,398,520. Patented Nov. 29, 1921.

UNITED FATENT APPARATUS FOR USE IN ANNEALING OR OTHERWISE TREATING METALS.

Specification of Letters Patent.

Application filed July 8, 1919. Serial No. 309,490.

(GRANTED UNDER THE PROVISIONS 0]? THE ACT OF MARCH 3, 1921, 41 STAT. L, 1313.)

To all whom it may concern:

Be it known that I, ALFRED HOWGATE, a subject of the King of Great Britain and resident of Clovelly, Riddlesden, Keighley, in the county of York, England, have invented a certain new and useful Improvement in Apparatus for Use in Annealing or Otherwise Treating Metals, of which the following description, together with the ac companying sheet of drawings, is a specification.

My invention relates to apparatus for use in the manufacture of malleable iron and in like processes wherein iron vessels or containers known as pans are employed for receiving the articles to be treated.

In the carrying out of these processes the containers or pans are subjected to the actions of great heat for a continued period so that the deterioration of their exposed outer surfaces due to chemical or other actions, renders them in a comparatively short time, entirely unfit for use. To produce pans of such a formation or construction as will permit their said exposed outer surfaces better to withstand the actions referred to and therefore to prolong the effective usefulness of said pans, is the object of my present invention.

To attain this object I follow the method of constructing the pans described, and the method of protecting the outer surfaces of same as hereinafter explained by reference to the accompanying sheets of drawings in. which Figure 1 shows in perspective, a cylindrical vessel, container or pan constructed in accordance with my invention.

Fig. 2 is a sectional plan taken on line A. B. of half of the vessel shown by Fig. 1.

'Fig. 3 is a vertical sectional elevation of part of a pan.

Fig. 4 is a perspective view of a rectangular vessel or pan constructed in accordance with my invention.

Fig. 5 is a sectional plan taken on line C. D. of half of the vesselshown by Fig. 4.

In carrying my invention into effect I- make use of pans at either of the cylindrical shape shown by Figs. 1 and 2 or of the rectangular shape shown by Figs. 4 and 5. Or these pans may be of any shape to meet the requirements of any particular work that they have to perform.

On the outer surfaces of these pans a I form projecting flanges or ribs 6 preferably integrally with the body part of said pans, or these may be riveted or otherwise secured thereto. I

These flanges 7) are arranged both longitudinally and vertically upon said outer surfaces of the pans a so that spaces 0 are formed between them.

These spaces 0 I fill with refractory material such as fire clay, molders sand or the like, or with a mixture of these materials. I also extend the thickness of this protecting material so that I can make it extend over the outer surfaces of the ribs 6.

In order to enable the ribs 6 better to retain the protecting material within the spaces which they surround, I form said ribs of greater width on their outer surfaces than they are at the part which is in contiguity with the body a, thus the edges of said ribs overhang the adjoining spaces and when the protecting material becomes baked within said spaces it is there secured by what may be termed its dove tailed formation which prevents it from falling away or becoming detached.

In certain cases it may be found possible to retain the protecting material in position by ribs or flanges which are straight and do not overhang the adjoining spaces, while further it may be found advantageous to have the ribs or flanges 6 arranged in slanting positions instead of being at right angles to each other asshown in the drawings.

By following the method of producing pans or containers as hereinbefore described I have found that the body part-a need not be so thick as they are in ordinary pans, hence their cost of production in this respect is reduced.

Such being the nature and object of my said invention, what I claim is 1. As a new article of manufacture an annealing pan provided with exterior vprojections shaped to form a dovetail or look, and a layer of refractory material covering the surface of the annealing pan which material is held in position by said dove-tail or look.

2. An open ended annealing pan having on its exterior surface ribs at right angles to each other, sections of refractory material inclosed by said ribs and dove tail or looking surfaces on said ribs for holding said sections of refractory material in position.

ALFRED HOWGATE.

Patented Nov. 29, 1921. 

